I haven't read YAML before, (Data::Dumper is nice and perl-y), so I'm partly guessing at the structure here.

@subgraphs looks like a list of the connected components. Pick one element of the array, and you're looking at one subgraph.

The number of connected components is just 0+@subgraphs.

In reply to Re: Finding connected components in a graph. by SuicideJunkie
in thread Finding connected components in a graph. by zing

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